Comparison between Toric and Non-Toric Intraocular Lenses in Patients with Corneal Astigmatism: A One-Year Multicenter Study
|Hiroko Bissen-Miyajima1*, Yasushi Inoue2, Tomohisa Nishimura3, Yoko Taira4, Toshiki Sugimoto5, Mikio Nagayama6, and Kazuto Shimokawabe7|
|1Department of Ophthalmology, Tokyo Dental College Suidobashi Hospital, Tokyo, Japan|
|2Inoue Eye Clinic, Okayama, Japan|
|3Mikawa Eye Clinic, Saga, Japan|
|4Ryuundo Eye Clinic, Saitama, Japan|
|5Okayama-Minami Eye Clinic, Okayama, Japan|
|6Nagayama Eye Clinic, Okayama, Japan|
|7Shimokawabe Eye Clinic, Saga, Japan|
|Corresponding Author :||Hiroko Bissen-Miyajima, MD, PhD
Department of Ophthalmology
Tokyo Dental College Suidobashi Hospital
2-9-18 Misaki-cho, Chiyoda-ku
Tokyo, Japan 101-0061
E-mail: [email protected]
|Received: November 20, 2015 Accepted: January 05, 2016 Published: January 11, 2016|
|Citation: Bissen-Miyajima H, Inoue Y, Nishimura T, Taira Y, Sugimoto T, et al. (2016) Comparison between Toric and Non-Toric Intraocular Lenses in Patients with Corneal Astigmatism: A One-Year Multicenter Study. J Clin Exp Ophthalmol 7:510. doi: 10.4172/2155-9570.1000510|
|Copyright: © 2016 Bissen-Miyajima H, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.|
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Objective: To compare the clinical results obtained with a toric intraocular lens (IOL) and non-toric IOL in eyes with corneal astigmatism.
Methods: This multicenter retrospective study included eyes with corneal astigmatism ranging from 0.75
diopter (D) to 3.00 D that were implanted with a toric IOL and a non-toric IOL. Non-toric IOLs were implanted before toric IOLs were approved, and the eyes were divided into three groups (T3, T4, or T5) depending on the preoperative degree of corneal astigmatism. Residual refractive cylinder, uncorrected distance visual acuity (UDVA), and contrast sensitivity were compared more than 1 year after implantation.
Results: The toric group included 149 eyes (mean patient age, 73.7 ± 7.9 years standard deviation, SD) and the non-toric group included 121 eyes (mean patient age, 76.2 ± 5.9 years). One year postoperatively, the respective residual refractive cylinder values and ± SD of the toric/non-toric groups were -0.61 ± 0.43/-1.45 ± 0.98 D (all eyes), -0.58 ± 0.42/-1.14 ± 0.70 D (T3), -0.59 ± 0.42/-1.63 ± 0.99 D (T4), and -0.67 ± 0.47/-2.18 ± 1.27 D (T5). The respective logarithm of the minimum angle of resolution UDVA values was 0.00 ± 0.12/0.16 ± 0.20 (all eyes), 0.00 ± 0.11/0.13 ± 0.18 (T3), 0.00 ± 0.13/0.25 ± 0.23 (T4), and 0.00 ± 0.11/0.17 ± 0.16 (T5). The toric group had better cylinder and UDVA outcome values; the difference between the groups reached significance (p<0.0001). In the toric group, the IOL rotation after implantation was 4.3 ± 4.0 degrees.
Conclusion: Toric IOLs reduced the residual refractive cylinder in cases with corneal astigmatism between 0.75 and 3.00 D, and this effect was similar among different toric models. Toric IOLs are useful to improve the UDVA after cataract surgery.